fix(el3-runtime): typecast operands to match data type

This corrects the MISRA violation C2012-10.3:
The value of an expression shall not be assigned to an object with a
narrower essential type or of a different essential type category.
Replaced usage of 'unsigned int' with 'size_t' to ensure type
consistency and prevent assignment to a narrower or different
essential type.

Change-Id: I79501e216a04753ebd005d64375357b9332440d9
Signed-off-by: Nithin G <nithing@amd.com>
Signed-off-by: Maheedhar Bollapalli <maheedharsai.bollapalli@amd.com>
diff --git a/include/bl31/interrupt_mgmt.h b/include/bl31/interrupt_mgmt.h
index e228495..0ca760e 100644
--- a/include/bl31/interrupt_mgmt.h
+++ b/include/bl31/interrupt_mgmt.h
@@ -83,6 +83,7 @@
 #ifndef __ASSEMBLER__
 
 #include <errno.h>
+#include <stddef.h>
 #include <stdint.h>
 
 /*******************************************************************************
@@ -143,7 +144,7 @@
 /*******************************************************************************
  * Function & variable prototypes
  ******************************************************************************/
-u_register_t get_scr_el3_from_routing_model(uint32_t security_state);
+u_register_t get_scr_el3_from_routing_model(size_t security_state);
 int32_t set_routing_model(uint32_t type, uint32_t flags);
 int32_t register_interrupt_type_handler(uint32_t type,
 					interrupt_type_handler_t handler,
diff --git a/include/lib/el3_runtime/context_mgmt.h b/include/lib/el3_runtime/context_mgmt.h
index f71f33c..80f68f7 100644
--- a/include/lib/el3_runtime/context_mgmt.h
+++ b/include/lib/el3_runtime/context_mgmt.h
@@ -23,15 +23,15 @@
  ******************************************************************************/
 void cm_init(void);
 void *cm_get_context_by_index(unsigned int cpu_idx,
-			      unsigned int security_state);
+			      size_t security_state);
 void cm_set_context_by_index(unsigned int cpu_idx,
 			     void *context,
 			     unsigned int security_state);
-void *cm_get_context(uint32_t security_state);
+void *cm_get_context(size_t security_state);
 void cm_set_context(void *context, uint32_t security_state);
 void cm_init_my_context(const struct entry_point_info *ep);
 void cm_setup_context(cpu_context_t *ctx, const struct entry_point_info *ep);
-void cm_prepare_el3_exit(uint32_t security_state);
+void cm_prepare_el3_exit(size_t security_state);
 void cm_prepare_el3_exit_ns(void);
 
 #ifdef __aarch64__
diff --git a/include/lib/el3_runtime/cpu_data.h b/include/lib/el3_runtime/cpu_data.h
index 20a6c39..ba2f8d5 100644
--- a/include/lib/el3_runtime/cpu_data.h
+++ b/include/lib/el3_runtime/cpu_data.h
@@ -217,7 +217,7 @@
  * an access is not out-of-bounds. The function assumes security_state is
  * valid.
  */
-static inline context_pas_t get_cpu_context_index(uint32_t security_state)
+static inline context_pas_t get_cpu_context_index(size_t security_state)
 {
 	if (security_state == SECURE) {
 		return CPU_CONTEXT_SECURE;